Brass NPT Tee Pipe Fittings — Reliable Branch Connections for Water, Air & Fuel Lines
Whether you're a plumber routing a new water supply branch, a DIYer extending a compressed air line in the garage, or a technician splitting a fuel feed, finding a tee fitting that threads cleanly and holds pressure without leaking is non-negotiable. Mismatched threads or thin-walled fittings can mean callbacks, leaks, and wasted time. These brass NPT tee pipe fittings are built to give you a solid, leak-resistant branch connection the first time.
Each fitting is machined from brass and features NPT (National Pipe Taper) threads on all three ports. Available in equal and reducing configurations across six thread-gender combinations — M×M×M, F×F×F, M×M×F, M×F×M, F×M×F, and F×F×M — with sizes ranging from 1/8" (≈3.2 mm) up to 2" (≈50.8 mm). Packing options of 1, 2, or 5 pieces let you order exactly what your job requires.
Typical use cases include residential and commercial plumbing branch lines, compressed air distribution manifolds, natural gas and propane supply splits, irrigation system tee-offs, and light industrial fluid handling. These brass tee fittings for water lines and air systems are a go-to for contractors and serious DIYers who need a dependable NPT branch fitting in multiple sizes.
🔗 Compatibility: Fits standard NPT (National Pipe Taper) threaded pipes and fittings. Suitable for water, compressed air, natural gas, propane, and fuel lines. Always use PTFE thread tape or pipe sealant on male threads before assembly.
✅ Key Features of These Brass NPT Tee Pipe Fittings
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🔩Six Thread-Gender Configurations — Available in M×M×M, F×F×F, M×M×F, M×F×M, F×M×F, and F×F×M, so you can match any existing pipe layout without adapters.
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📏Wide Size Range — Covers 1/8" through 2" NPT, including equal tees and reducing tees, making these fittings suitable for everything from small instrument lines to main supply branches.
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🛠️Machined Brass Construction — Brass offers good corrosion resistance, machinability, and thread integrity, making it a reliable choice for threaded pipe fittings in water, air, and fuel applications.
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🔄Tapered NPT Threads — The tapered thread form creates a mechanical seal as the fitting is tightened, reducing the risk of thread cross-threading and improving leak resistance when used with PTFE tape or pipe sealant.
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📦Flexible Pack Quantities — Order 1, 2, or 5 pieces per variant to match your project scope — whether it's a single repair or a multi-branch installation.
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🏭Broad Application Compatibility — Suitable for residential plumbing, compressed air lines, natural gas and propane systems, irrigation tee-offs, and light industrial fluid distribution.
📐 Technical Specifications — Brass NPT Tee Pipe Fittings
| Material |
Brass |
| Thread Standard |
NPT (National Pipe Taper) |
| Thread Gender Configurations |
M×M×M, F×F×F, M×M×F, M×F×M, F×M×F, F×F×M |
| Size Range |
1/8" to 2" (≈3.2 mm to ≈50.8 mm) nominal pipe size |
| Tee Types |
Equal tee, reducing tee (see variant options) |
| Finish |
Natural brass (unlacquered) |
| Working Pressure |
Typically up to 200–300 PSI (water/air at ambient temp); contact us to confirm for specific size |
| Compatible Media |
Water, compressed air, natural gas, propane, fuel (verify compatibility for your application) |
| Pack Quantity |
1 Pc, 2 Pcs, or 5 Pcs (see variant options) |
| Weight per Piece |
See variant options (listed in grams for 1/2" and larger sizes) |
| Country of Origin |
Contact us to confirm |
⚠️ Note: Always verify the thread size, gender configuration, and media compatibility before ordering. If you're unsure which variant fits your application, contact us with your pipe OD or existing fitting specs.
❓ Frequently Asked Questions
How do I choose the right tee fitting size for my pipe?
Match the fitting size to your existing pipe's nominal pipe size (NPS). For example, a 1/2" pipe typically uses a 1/2" NPT tee. If you're branching to a smaller line, choose a reducing tee (e.g., 3/4" × 3/4" × 1/2"). When in doubt, measure the outer diameter of your pipe and consult an NPT size chart — a 1/2" NPT pipe generally has an OD of approximately 0.840" (21.3 mm).
What is the pressure rating of these brass tee fittings?
Brass NPT fittings generally handle working pressures up to 200–300 PSI for water and air at room temperature. Actual ratings vary by size and wall thickness — larger sizes typically have lower pressure ratings. For high-pressure or safety-critical systems, please contact us to confirm the specific rating for your chosen variant.
Can these brass tee fittings be used outdoors or in wet environments?
Brass offers good corrosion resistance for most outdoor and wet environments, including water supply lines and irrigation systems. However, brass is not recommended for highly acidic or saline environments. For coastal or chemically aggressive settings, stainless steel fittings may be a better choice.
Are these fittings compatible with NPT threads?
Yes. These fittings use NPT (National Pipe Taper) threads, the US standard for threaded pipe connections. They are compatible with standard NPT male and female threaded pipes and fittings. Always apply PTFE thread tape or pipe thread sealant on male threads before assembly to ensure a leak-free connection.
What fluids are these brass tee fittings suitable for?
These fittings are generally suitable for water, compressed air, natural gas, propane, and fuel lines. Brass is compatible with most common household and light industrial fluids. Always verify compatibility with your specific fluid and operating conditions — particularly for aggressive chemicals or high-temperature steam applications.
What is the difference between M×M×M, F×F×F, and mixed configurations?
M stands for Male (external threads) and F stands for Female (internal threads). M×M×M means all three ports have male threads; F×F×F means all three ports have female threads. Mixed configurations like M×M×F or F×M×F allow you to connect pipes with different thread types at each port, offering greater flexibility in complex plumbing layouts without needing additional adapters.
Do I need thread sealant when installing these fittings?
Yes. NPT threads are tapered and rely on thread sealant or PTFE (Teflon) tape to create a leak-free seal. Apply PTFE tape clockwise around male threads — typically 2–3 wraps — before threading into a female port. Do not overtighten: hand-tight plus 1–2 turns with a wrench is generally sufficient for brass NPT fittings to avoid cracking the fitting body.
🛒 Select your size and configuration above, then add to cart — ships from our US warehouse.
